Stacking guest chairs stack up to five high for use in meeting rooms, conference areas, cafeterias & reception areas. Molded seat underpans protect seat fabric when stacked & give a finished appearance. 20-1/4" wide x 19-3/4" deep seat is made with a compound-curved, blow-molded plastic & a 3" thick urethane foam cushion. Usable seat depth is 16-3/4". Seat from floor height is 18". Inverted U construction with 1" 14-gauge steel tubing runs through polymer arm caps for exceptional rigidity. Guest chairs have fully upholstered fan backs that measure 21-1/4" wide & 16-1/4" high. Polymer arm caps have gently sloping, wide top surfaces for maximum comfort. Upholstery is made with 50 percent polyester & 50 percent acrylic fabric with fabric protector. Chair is available in black frame only. It is certified by SCS to be in compliance with specific, indoor, air-quality emission requirements. It also meets or exceeds applicable ANSI / BIFMA standards.